/*
 * Copyright 2017 ~ 2025 the original author or authors. James Wong <jameswong1376@gmail.com>>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.wl4g.infra.common.remoting;

import java.io.IOException;
import java.net.URI;

import com.wl4g.infra.common.lang.Assert2;
import com.wl4g.infra.common.remoting.standard.HttpHeaders;

import io.netty.handler.codec.http.HttpMethod;

/**
 * Abstract base class for {@link ClientHttpRequestFactory} implementations that
 * decorate another request factory.
 */
public abstract class AbstractClientHttpRequestFactoryWrapper implements ClientHttpRequestFactory {

    private final ClientHttpRequestFactory requestFactory;

    /**
     * Create a {@code AbstractClientHttpRequestFactoryWrapper} wrapping the
     * given request factory.
     * 
     * @param requestFactory
     *            the request factory to be wrapped
     */
    protected AbstractClientHttpRequestFactoryWrapper(ClientHttpRequestFactory requestFactory) {
        Assert2.notNull(requestFactory, "ClientHttpRequestFactory must not be null");
        this.requestFactory = requestFactory;
    }

    /**
     * This implementation simply calls
     * {@link #createRequest(URI, HttpMethod, ClientHttpRequestFactory)} with
     * the wrapped request factory provided to the
     * {@linkplain #AbstractClientHttpRequestFactoryWrapper(ClientHttpRequestFactory)
     * constructor}.
     */
    @Override
    public final ClientHttpRequest createRequest(URI uri, HttpMethod httpMethod, HttpHeaders requestHeaders) throws IOException {
        return createRequest(uri, httpMethod, this.requestFactory, requestHeaders);
    }

    /**
     * Create a new {@link ClientHttpRequest} for the specified URI and HTTP
     * method by using the passed-on request factory.
     * <p>
     * Called from {@link #createRequest(URI, HttpMethod)}.
     * 
     * @param uri
     *            the URI to create a request for
     * @param httpMethod
     *            the HTTP method to execute
     * @param requestFactory
     *            the wrapped request factory
     * @param requestHeaders
     *            Request headers
     * @return the created request
     * @throws IOException
     *             in case of I/O errors
     */
    protected abstract ClientHttpRequest createRequest(
            URI uri,
            HttpMethod httpMethod,
            ClientHttpRequestFactory requestFactory,
            HttpHeaders requestHeaders) throws IOException;

}